An examination of biological and environmental factors and their interactions as they impact the development of young children, and may interfere with typical growth and development. The effects of various risk factors, developmental delays or disabilities on patterns of development in the physical, cognitive, language, social-emotional, and adaptive domains will be discussed. Emphasis will be placed on low-incidence disabilities. Field experiences required. Prerequisites: PSY-210, or PSY-310, PSY-312, CD-234. Prerequisite or corequisite: CD-340.